Electrochemical Capacitance of Cobalt Oxide Nanotubes on Nickel Foam

Yagmur, V.; Atalay, F.E.; Kaya, H.; Avcu, D.; Aydoğmuş, Ercan

doi:10.12693/aphyspola.123.215

Cited by 10 publications

(6 citation statements)

References 7 publications

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“…In addition, XRD results showed that the cobalt hydroxy carbonate structure obtained after the hydrothermal treatment has a nanocrystalline structure at 300 °C, while the face-centered Co 3 O 4 structure is formed at 360 °C. Based on these results and our previous experience, , temperatures of 300 and 360 °C were chosen as a annealing temperature. In addition, our BET measurements showed that the Co 3 O 4 structure had the highest porosity at these temperatures.…”

Section: Resultsmentioning

confidence: 99%

Juglans Sporopollenin for High-Performance Supercapacitor Electrode Design

et al. 2020

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Recently, plant pollen has been used as a source of activated carbon to produce carbon-containing supercapacitor electrodes. However, in this study, pollen was used as a biotemplate with a completely different approach. As a biotemplate, pollen offers a wide range of varieties in terms of exterior, porosity, shape, and size. An electrode formed by the use of metal oxide grown on the pollen exine layer (sporopollenin microcapsules) as the active substance will inevitably exhibit good electrochemical capacitive properties. Juglans male flowers have been distinguished by dissection from anthers. Isolation of pollen grains from anthers was carried out using sieving from suitable sieves (45–200 μm). Juglans sporopollenin exine microcapsules (SECs) were separated from the intine and protoplasm by acetolysis in combination with reflux. The solution containing SECs, metal ions, and Ni foam was put into a Teflon-lined hydrothermal container, and then, it was reacted at 120 °C for 15 h. The resulting precipitate, as well as the Ni foam, was heat-treated at 300 and 360 °C for 3 h in air. The raw pollen, chemically treated pollen, and cobalt-coated SEC (CoSEC) and CoSEC/Ni foam were characterized using scanning electron microscopy, Brunauer–Emmett–Teller surface area analysis, thermogravimetric analysis, and X-ray diffraction techniques. Two different types of supercapacitor electrode designs, with the use of exine microcapsules of Juglans sporopollenin, were performed for the first time. The maximum specific capacitance was up to 1691 F g –1 at 5 A g –1 .

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Section: Resultsmentioning

confidence: 99%

Juglans Sporopollenin for High-Performance Supercapacitor Electrode Design

et al. 2020

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“…The capacitance, C a , is (e.g., Kuo et al 2007;Yagmur et al 2013;Chen et al 2013): Voltage is defined (Shen et al 2016) as: Voltage = (average Eh (V) − initial Eh (V))/P w /t. The applied working electrochemical voltage = (average Eh (V) − initial Eh (V)).…”

Section: Data Set and Methodologymentioning

confidence: 99%

ZVI (Fe0) desalination: catalytic partial desalination of saline aquifers

Antia¹

2018

Appl Water Sci

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Globally, salinization affects between 100 and 1000 billion m 3 a −1 of irrigation water. The discovery that zero valent iron (ZVI, Fe 0 ) could be used to desalinate water (using intra-particle catalysis in a diffusion environment) raises the possibility that large-scale in situ desalination of aquifers could be undertaken to support agriculture. ZVI desalination removes NaCl by an adsorption-desorption process in a multi-stage cross-coupled catalytic process. This study considers the potential application of two ZVI desalination catalyst types for in situ aquifer desalination. The feasibility of using ZVI catalysts when placed in situ within an aquifer to produce 100 m 3 d −1 of partially desalinated water from a saline aquifer is considered.

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“…3 shows the eect of scan rate on the cathodic peak currents obtained from CV. The charge-storage mechanism of NiO is not through a surface redox reaction at the interface but a diusion controlled reaction [5,6]. Fig.…”

Section: Methodsmentioning

confidence: 99%

The Fabrication of NiO Microtubes Using Bacillus subtilis/Bacteria

et al. 2014

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The nickel oxide microtubes with high surface-to-volume ratio have been achieved using the Bacillus subtilis bacteria. Surface properties of the metal-oxide nanostructured materials were investigated by electron microscopy. The surface area of that was also studied by the BrunauerEmmettTeller analysis method. The materials were used at the construction of supercapacitor as an electrode active material.

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Electrochemical Capacitance of Cobalt Oxide Nanotubes on Nickel Foam

Cited by 10 publications

References 7 publications

Juglans Sporopollenin for High-Performance Supercapacitor Electrode Design

Juglans Sporopollenin for High-Performance Supercapacitor Electrode Design

ZVI (Fe0) desalination: catalytic partial desalination of saline aquifers

The Fabrication of NiO Microtubes Using Bacillus subtilis/Bacteria

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